Love it. The basic Tank of the game, everything a tank should be. Great health and can really dish out the damage. Even with the likes of Thor and Tenonto out there, it is going to give right back after soaking up a huge hit.
Is it still an end-game Dino? You betcha! It did lose part of its niche in the current meta but is still a very relevant combatant. There are too many easy to level counters for it now, though. I think many also gave up on it due to Stego being park locked and they do not have easy access to level it as they did previously.
I stopped mine at 23 at 4100 Trophies. It can hold its own with anything in this range. I prefer it over a 22 Trago due to the damage output difference. If Trago loses the ability to shield, it really does not have much to hold it up. You can give a stun and Rampage but those crunchers make fast work out of it after that.
Currently, any Stego is better spent on Monosteg, it has a better place in the meta.